Tornado Alley (PROG)

[stockmule]

Why was polio a summer diease? That's when individuas contracted it. When are crops, yards, mosquito etc. spraying done. It never spread like other contagious diseases in family units.
I personally know one n.y. husband wife and 2 kids family where only the mother contracted it in the 50's. near farming.
As a kid we had ariel spraying on wheat crops a couple of years. We had to wave flags so the pilot could line up on each pass. As he got close we moved but I remember many droplets coming down on me as well. I don't know what was used but only did it for 2 years.